Process of making gimp



Nov. 10, 1925- 1,561,229 H. J. HAON PROCESS OF MAKING GIMP Filed April 1, 1921 Adhesive,- adberem under pressure when dry e. g. rubber cemen 2.

Fabric.

5 H SfrIpS 'Oihed all/Illa 'IIIIIII a IIIIIIIIIIIIIIIII I Fly. 4

a Fig. 5 l 7 hi SIn'p bIhf pressed sz'mulianeously wz'ih ressm turned over ed es. Fig. 6 P g 9 7 By his afforney Patented Nov. 10, 1925.

UNITED STATES HARRY J'- HAON, OF NEWBURGH, NEW YORK, ASSIGN & COMPANY, OF WILMINGTON,

PROCESS OF MAKING GIMR' Application filed- April 1,

To all whom it may concern:

Be it known that I, HARRY J. HAON, a citizen of the United States, and a resident of Newburgh, in the county of Orange and State of New York, have invented a certain new and useful Process of Making Gimp, of which the following is a specification.

This invention relates to the making of strips having a margin folded over upon the body of the strip and attached thereto. An example of such strips is gimp, and the invention, without restricting it thereto, is described with more particular reference to the making of gimp.

Gimp is used in large quantities, in upholstery for example, and as it must be sold at a comparatively low price, it is desirable that it be made with as small an outlay for factory floor space as possible, and the waste of materials be kept at a minimum. Also, the gimp should be flexible and, so, in gimp whose body and fold are connected by adhesive, the adhesive should be such as to give high flexibility.

Heretofore in making gim the practice has been to: cut the web 0 goods, from which the gimp was to be made, into a number of strips of desired width, one strip being cut for each strip of gimp to be made; apply adhesive to one side of each individua strip; and fold over the margins of the strips onto the bodies and attach them thereto (by the adhesive) to make the strips of gimp, the procedure also including the dr ing of the adhesive. In this process, calling as it does for the applying of adhesive to each individual strip, much time, and labor are used and various difiiculties encountered; and much adhesive is wasted and a considerable amount of material damaged by the adhesive overflowing onto the other side of the goods along the many edges-two on each strip-produced by cutting the web into strips.

Furthermore, it has been the practice to use an adhesive, glue for exaigple, which must be used wet, and then dri after the making of a joint, to give proper adhesion. Now gimp must be furnished to the trade in called-for lengths, having no relation to the strip-lengths provided by cutting a web of goods lengthwise. It therefore is necessa to join the various cut strips end-toen and, later, cut the long strip so made into desired lengths; and, for simplicity and 1921. Serial No. 457,716.

to avoid rehandling the material, the joining should done before the goods are fed to the fold1ng machine. For simplicity, it s desirable to use the same adhesive for oining the strips as is used for the mar 'ns. It is not feasible to stop the folding macfiiine for any material time in order t join one strip to the next, yet when using glue to ]01I1 the strips, such stopping would be necessary (to give opportunity for drying) were it attempted to feed one strip through the machine and, then, just before its rear end passed to the machine, join the forward end of the next strip to it. A similar obectlon applies to joining the strips by sewlng, as that too requires considerable time. To avoid such stopping when using glue, or sew1ng, it is practically necessary to first oin the ends of a large number of strips to make one very long strip which can then be run continuously to the machine. But this practice gives such great lengths of material that t ey cannot be handled in the roll. So, it is the practice to horizontally suspend the lengths of joined strips in large lofts, since it is of course necessar to provide in some way for the material bein held flat and not tangled, ready for feeding to the folding machine. Not only do these lofts take up large factory areas, but the handling, and the making, of such great lengths of material, is at best, awkward, difficult, and time consuming. Another difficulty arising from the fact that lue must be used wet is, that during the olding it makes the strips awkward to handle and s and clogs the folding horns of the olding machine. And, finally, p produced by the use of glue is of in erior flexibility, because of the relative inflexibility of the adhesive.

The present invention provides a process whereby gimp of superior flexibility can be made rapidly and relatively inexpensively, waste of adhesive, damage of material, handling ofexcessive lengths of material, use of large factory areas for suspending and storing the material, and mining of the folding horns, being avoi d. It is the object of the invention to provide such a process and also to improve generally upon processes of the character indicated.

In the accompanying drawin I have illustrated, somewhat conventiona y and diagrammatically, gimp in its various stages of OR TO E. I. DU PONT DE NEHOUBS DELAWARE. A CORPORATION OF DELAWARE.

manufacture in accordance with the present process. in the drawing:--i igure 1 is a broken back plan view of a web of leather substitute with the fabric side uppermost and with adhesive applied to such side of the web before the same is cut into strips of proper width for gimp; Figure 2 a view of the web after being cut into strips; Figure 3 is a view illustrating the initial joinin of a second strip to one which has been su stantially fully folded into gimp; Figures 4 and 5 are enlarged cross-sectional views substantially on line 4-4 and 5-5 of Figure 3, showing of individual layers of fabric, leather substitute coating, and adhesive being omitted for simplicity; Figure (3 is a view illustrating the ultimate and sinmltaneous folding and joining of the two strips; and Figure 7 is a cross-sectional view substantially on line 7-7 of Figure 6, detail showing of layers being omitted as in l i ures 4 and 5.

i ccording to the present invention, the procedure, for example in making leathersubstitute gimp, is preferably as follows First, the adhesive is applied to the back, or non-pyroxylin-coated, side of the web of goods, that is, the adhesive is applied before the web is cut into strips; second, the adhesive is dried; third, the adhesivecoated web is slit into strips, and fourth, the strips are folded into gimp. Working in this way, i. e. coating with adhesive before the web is cut into strips, there are, for all the (ultimate) strips which a web of a given width provides, but two edges along which adhesive can overflow to be wasted or to damage the goods on the face side, regardless of the number of strips to be made from the web. Thus, a material saving of adhesive and goods is effected, and the step of applying adhesive greatly simplified.

In further accordance with the invention, an adhesive is used which is highly flexible when dry, can be quickly dried, and which when dry will not ordinarily, as when the goods are rolled upon themselves or spooled, adhere to a pyroxylin-coated, or similar, surface, but under pressure will adhere to itself and, too, will adhere to a pyroxylin, or similiar, surface sufficiently to provide for the joinin of the overlapped ends of the stri s. A hesive of this character can be app ied to the goods and dried, and if desued the goods wound up for convenient storage, and then, contrary to the case of glue where that has been applied and dried, the edges of a strip can be attached to the body thereof without having to wet the adhesive. Thus convenient storage of adhesive-coated strips, without having to ultimately wet the strips, is provided for, and gumming of the folding horns avoided. Furthermore, one Strip can be joined to the next by the adhesive thereon without substantial stopping of the folding machine, no drying of the joint being required, and, so, webdcugth strips can be conveniently fed roll by roll to the machine, joining the first to the second as the. first runs out, and so on, and all handling of long len the of material, use of large factory areas or suspending lofts, avoided. Since the adhesive will under suitable pressure adhere to a leather-substitute surface, the various strips cut from a web can if desired be joined end to end by merely overlapping the ends and pressing them together, as between the thumb and finger.

An adhesive such as that indicated above is preferably a rubber cement, for example, one made by dissolving substantially 1t) parts of crude rubber in substantially 90 parts of 90% benzol (parts by weight). This is dried sufficiently to substantially remove the solvent, leaving the rubber in a condition such that it will not gum the folding horns nor ordinarily substantially adhere to a pyroxylin surface, but will adhere to itself and to a pyroxylin surface under pressure, in which condition it will remain indefinitely.

As an example of practical factory working according to the present method, the procedure may be as follows :-The leather substitute, in a web say 50 inches wide, and of indefinite length, is run through a coating machine such as used for coating with pyroxylin and having a drying chamber, and the cement applied to the entire back or fabric side of the web and dried in substantially the same manner as a pyroxylin solution would be applied and dried; then the bale of goods, wound up at the discharge end of the coating machine, is, at convenience, run throu h a cutting machine and cut longitudinal y of the web into strips of desired width for gimp and of indefinite length, e. g. the length of the web, and the strips rolled into separate rolls; and then, when desired, the stri s are unrolled and fed to any suitable fol ing and rolling machine, and the adhesive-coated sides of the marginal edges folded over onto the adhesive-coated sides of bodies of the strips, and rolled down to apply the pressure necessary to give proper adhesion, thus completing the strips of gimp. In the making, when one of the strips, of the length cut from the web, has racticall all been run through the fol ing mac ine, the end of another strip is quickly joined to the first, without substantial sto ping of the machine, and strips of in efinite length thus simply produced. Of course, if desired the coated goods may be run directly to the cutter and the cut strips fed directly to the folder.

A procedure of the type referred to is indicated in the drawing. As shown in Figure 1, leather substitute 1 is coated, on its fabric side, in the web, with adhesive; then the web is cut into strips as 1', 1", 1 (Figure 2); when one strip, as 1, has substantially all been folded into gimp, another strip, as 1", is initially joined thereto (Figure 3) and then the ultimate joinin of the strips is carried out simultaneous y with the beginning of the folding of strip 1" into gimp (Figure 6). The folding and pressing may be done in any suitable machine ada ted to such work, such machines being wel -known and formin no part of the present invention. A mac ine of the general type is shown in U. S. Patent No. 231,327, J oslin, August 17, 1880, suchmachine comprising fundamentally a shoe or folder for turning over the edges of strips, and pressing rollers for pressing down the folded edges on to the body of the strip.

Althou h more particular reference has been marge to gimp, and, for convenience merely, the claims refer to gimp it is to be understood that the process is applicable to the making of folded strips other t an mp, such as welt for example, and gimp is not used in an exclusive sense.

The invention having been thus described, what is claimed is 1. The process of making gimp which comprises, applying to substantially one entire side of a relatlvel wide web of material and adhesive capa le of adhering to itself merel under pressure when dry, drying the a esive, cutting the web longitudinally into a plurality of relatively narrow strips, longitu inally folding the adhesivecoated side of one said strip onto itself, and applying pressure to the fold to cause said adhesive to unite the fold and the body of the strip, to provide a stri of im from such strip of material, initiall oimn the end of a second said strip to t e end 0 said one strip by said adhesive, and foldin and pressing the second strip into gimp, su tantially continuously with the first pressing and folding and simultaneously pressing the joint of the strips.

2. The process of making leather-substitute gimp which com rises, applying rubber cement to substantial y the entire back side ofa relatively wide web of leather substitute, comprising textile fabric having a pyroxylin face side and a back side of exposed fabric, drying the cement, cutting the web longitudinally into a plurality of relatively narrow stri s, longitudinally folding the cement-coated ack side of one said strip onto itself, and applying pressure to the fol to cause said cement to unite the fold and the body of the strip, to provide a stri of gimp from such strip of material, initially joinln the end of a second said strip to the end 0 said one strip by said cement, and folding and pressing the second stri into gimp, substantiall continuously wit the first ressing an folding, and simultaneously pressing the joint of the strips.

In testimony whereof I aflix my signature HARRY J. HAON. 

